高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (5): 672.

• 研究论文 • 上一篇    下一篇

四苯基卟啉及其衍生物的结构与性质研究(Ⅳ)——二质子四苯基卟啉及其衍生物的光谱、pKa与取代基常数间的线性关系

罗明道, 李良超, 颜肖慈, 屈松生   

  1. 武汉大学化学系, 武汉 430072
  • 收稿日期:1992-04-18 修回日期:1993-01-15 出版日期:1993-05-24 发布日期:1993-05-24
  • 通讯作者: 罗明道

Studies on Structure and Properties of Tetraphenylporphyrin and Its Derivatives (Ⅳ)——Linear Relationship Between Spectra or pKa and Substituent Constants of Two-protonic Tetraphenylporphyrin and Its Derivatives

LUO Ming-Dao, LI Liang-Chao, YAN Xiao-Ci, QU Song-Sheng   

  1. Department of Chemistry, Wuhan Unitvrstig, Wukan, 430072
  • Received:1992-04-18 Revised:1993-01-15 Online:1993-05-24 Published:1993-05-24

摘要: 以HMO法剖析了二质子四苯基卟啉(H2TPP2+)及其衍生物的紫外-可见光谱,确定了四苯基卟啉(TPP)和H2TPP2+及其衍生物的λmax、pKa与取代基常数σ间的线性关系。

关键词: 光谱, HMO, 诱导效应, 共振效应, 空间效应

Abstract: The visible and UVspectra of the two-protonic tetraphenylporphyrin (H2TPP2+) and its derivatives were dissected with HMOmethod and group theory.Then the relationship between the sub-stituent constants σand λmax or pKa of tetraphenylporphyrin (TPP), H2TPP2+ and their derivatives were determined.That isi Y=P - A1σ1- -A2σR(or OR(+))+A3ES, where, Yis λmax or pKa of TPP, H2TPP2+ and their derivatives, respectively.Pis λmax or pKa of TPP, H2TPP2+, respectively, σ1, σR (or σR(+)) and Es are the induction effect, the resonance effect and the steric effect of the substituent constants of these compounds, respectively.A1, A2 and A3 are the empirical constants.The calculated values are in good agreement with the experimental values.

Key words: Spectra, HMO, Induction effect, Resonance effect, Steric effect

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